OFFSET
1,4
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000
Rémy Sigrist, Scatterplot of the first 500000 terms
Rémy Sigrist, Perl program for A308343
FORMULA
a(n) = Sum_{k = 1..n} (-1)^A038219(k).
EXAMPLE
PROG
(Perl) See Links section.
CROSSREFS
KEYWORD
sign
AUTHOR
Rémy Sigrist, May 21 2019
STATUS
approved